FYI, a bit of info rarely covered by Western media. China's attitude towards Uyghurs in the 20th century was super relaxed. As a result, the number of mosques grew from 2000 to 22000, Islam population grew rapidly while secular Uyghurs population shrunk, women started putting on black dresses, and children no longer went to schools and got educated in mosques instead. Entering 21st century, Uyghurs extremists bombed a few buses, slaughtered hundreds of Han civilians in city downtowns, and injured thousands. Then the CCP started the crackdown, and it's also a main driving factor for implementing the Great Firewall.